i think it comes down to the fact the Euros want it more. could you image any US players reacting to made putts like poulter?? i think the president's cup hurts the US and helps the Euros. the ryder cup is huge for the Euros because it's their only chance. and (i've never heard this, but could believe it) the Euros might have a chip on their shoulder knowing the US has another team event. and for the US, knowing they have the president's cup could lessen the pressure and feeling of "having to win." lastly, i think the Euro fans are more passionate.
I agree with some and disagree with other stuff you said. Presidents cup does hurt. Euro's who want it more, need it more. Poulter, Donald, Sergio and Westwood none have majors, so this is their major. The US caught a couple of bad breaks this year. Sned was hot and then wins 11 million bucks and kind of loses his mojo. Stricker should have never been on the team and Furyk should have only played the minimum matches. The American captains don't play the hot hands enough. Dl3 miss read the singles badly , he had some easy wins and misplaced a lot of them. for the last 10 years the teams have been led by Phil and TW 18 majors between them but almost no team passion or leadership, for Phil that has changed recently. No way ,the US fans are passionate but they need starters players with personality and they U.S. has had little of that lately. AK, Bradley, new phil, duff, ZJ, DJ, Rickie, Bubba, BVP and Webb. these are the kids of guys who can bring home cups and keep them.